A circular shaped item with an aperture manufactured to predetermined dimensions and designed for use as a seal in stuffing boxes, packing nuts, and the like. It may be (1) any nonmetallic molded or formed ring (except solid (without joint) rings having a square or rectangular cross section); or (2) any shredded metal or metal foil type metallic or semimetallic rings. Excludes felt items but includes multimaterial items in which one of the materials is felt. For solid (without joints) nonmetallic items with a square or rectangular cross section, see washer (as modified) and gasket. For rubber items specifically designed for weather-proofing doors, windows, chests, and the like see seal, nonmetallic angle; seal, nonmetallic channel; and seal, nonmetallic, special shaped section. For circular (with aperature) nonmetallic items with a solid round cross-section see o-ring. Excludes cup, compression; gasket; washer (as modified); and felt, mechanical, preformed.
Classification: Gaskets,washers & other seals
NSN 5920-00-276-8657
NSN 5998-00-867-1595
NSN 6220-00-104-8129
NSN 5965-01-080-9808
NSN 6105-01-535-4080
NSN 5975-01-231-7921
NSN 4140-00-724-9663
NSN 6135-01-538-7086
NSN 7035-01-268-0933
NSN 2925-01-016-3111
NSN 5905-01-622-1583
NSN 6645-01-447-6777